28 D NORTH E \-i rBRRITORl . 



B the Laurentian, near the north end of Lake Abatagomaw. 

 Beyond this, they are well Been in a narrow bay running for Boveral 

 miloa in a dire stion nearly east, where they occur both on the sho 



'>.i\ and. on islands. The rocks here are green chloritic Blatea. 

 In some places they contain crystals of hornblende, and are oocasion- 

 rstratified with dolomitic beds, weathering brown. The dip 

 along this stretch is from X. 31 W. to X 3 I. n 

 On the firsl portage beyond this bay there are considerable expot 



Battened Bpheroidal or renifonn masses, from a fow inches to 

 upwards oi a fool in diametor. They are made up of an indurated 

 greenish and purplish argillaceous rock, which is jaspery in its 

 texture. When sections of these Bpheroids have been exposed to 

 the weathor, they prosenl a concentric arrangomont of various Bhades 

 becoming lighter towards the centre The strike of these 

 rocks i- X. t;i E. and S. 61 W. To the end of the second portage, 

 the rock is :i greenish chloritic Blate, becoming, in places, epidotic 

 dioritic, the latter variety assuming a roniform structure, and 

 holding, between the concentric layers a Bofl dark greenish mineral, 

 mbling serpentine. The nexl exposure is :i little beyond the 

 entrance of Lake Chibogomou, and is the only one mel with for about 

 lour miles, on the main wesl Bhore, or on the islands immediately 

 to the eastward. It is a quartzose feldspathic reck, with films of 

 jreonish chloritic mineral. The feldspar is yellowish and the 

 quartz greenish in hue. On an island about seven miles from the 

 entrance to the lake, the rock is very similar, excepl that the chloritic 

 mineral above mentioned occurs onlj in Bpots. Between the last two 

 exposures, bul somewhal to the eastward of them, there arc two 

 islands, composed of a yellowish micaceous granite. For the next four 

 mile-, a- tar a- obsorved, on the north-oast Bide of the lake and the 

 islands adjacent, the rocks are a light grey and yellowish felsite, with 

 quartz and minute scales of mica or talc. In some places these are 

 associated with a green dio itic rock, in small bands, of from one to 

 Li feet wide, the strike ol which is S. 33 E. and X. 33 W 

 It this banding is due to bedding, which is doubtful, it is the only 

 indication of linos of stratification observed thus far on the lake. 



next point at which the rock is Been on the same side i- ju-t 

 befon reaching Paint Mountain. Here it is a green chloritic rock, 

 weathering to groyisb green, and holding considerable quantities of 

 netic iron ore disseminated in grains and crystals, Still closer to 

 Paint Mountain, on the shore, the rocks are green chloritic slate. 

 with no well-defined bedding. Here the yellow sulphurel of copper, 

 which is described farther on, occurs. These rocks are also more or 

 3 charged with 6ne-grained iron pyrites, for a distance of aboul 



